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  #1  
Old 08-02-2008, 09:17 PM
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Join Date: Jul 2008
Location: Arizona
Posts: 56
Unhappy I lost a cylinder!

Hi all,

I'm looking for some help...

My car (A 83 240D) started to nail or knock on cylinder number one (Found by cracking the injector nuts.) A couple of days later (Wednesday) I don't have the cylinder all at idle, I thought it was something in the fuel system because I had bubbles in that injector line that wouldn't go away. I did a compression test with the following results:

#1 11 bars
#2 28 bars
#3 28 bars
#4 27 bars

All done hot by the glow plugs. Hoping that the injector was leaking compression I redid #1 by the injector and got about 10 bars.

The next day I did a air induction test on number one and found it to be leaking all out of the crankcase So it would seem the rings are rather dead.

Now the part that scares me is the between the nailing/knocking and losing the cylinder, I was reseting the valve cover gasket and was cleaning the setting area with crab and brake cleaner. After doing that job I let it sit for at least 30 minutes so every thing could evaporate off but it seemed to start on crab cleaner! it must have gotten into the intake and stayed there. (I do need a manifold gasket.) I do not recall if after I got it started on diesel if I lost number one or not.

It seem to smooth out at highway speeds and I think I have all four at high engine speeds... All though Friday I stalled a few times coming to a stop. I think my fuel filter was dirty and I changed that today.

I would like to know what it sound like to you guys and if I would be killing it more by driving to my work and back every day, 80 miles round trip. My only other transportation likes it Diesel at 10 MPG.

Thank you,
Nathan.

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  #2  
Old 08-02-2008, 09:26 PM
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Posts: 18,350
I doubt it's ever going to get better so I'd keep driving it while I looked for a replacement engine.
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  #3  
Old 08-02-2008, 09:32 PM
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Location: Arizona
Posts: 56
It wouldn't be worth try to fix the one cylinder?
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  #4  
Old 08-02-2008, 09:39 PM
79Mercy's Avatar
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Location: Florida
Posts: 4,131
I don't think the carb cleaner would damage the head gasket, but there is always a chance. D
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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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  #5  
Old 08-02-2008, 09:50 PM
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Join Date: Jan 2007
Location: olympia washington
Posts: 1,809
do the oil trick, take the dry compression readings, then squirt some oil into the combustion chamber, take the readings again. If the compression goes way up, then you have ring issues. If it doesnt go way up, then you have head/valve issues.
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1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

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  #6  
Old 08-02-2008, 09:55 PM
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Location: NW WA
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Most of the time its #one that goes south, at least in the ones I've seen. Doing one cylinder is not much of an option with these engines.
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  #7  
Old 08-02-2008, 10:00 PM
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Location: Milford, CT
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Well its already shot so just drive it until you find a replacement.

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